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化学学报
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化学学报 ›› 1987, Vol. 45 ›› Issue (11): 1044-1047. 上一篇    下一篇

研究论文

1,2,4,5-苯四甲酸铒配合物的合成及其晶体结构

邢彦;金钟声;段治邦;倪嘉缵   

  1. 中国科学院长春应用化学研究所
  • 发布日期:1987-11-15

Synthesis and crystal structure of the 1:1 complex of pyromellitic acid with erbium

XING YAN;JIN ZHONGSHENG;DUAN ZHIBANG;NI JIAZUAN   

  • Published:1987-11-15

PDF

397

被引次数

12

合成了NH4^+[ErC6H2(COO)4.3H2O]^-.4H2O晶体,并测定了其晶体结构,发现稀土Er^+^3跟苯四甲酸中的五个氧原子及三个水的氧原子配位,形成八配位的配合物.配位多面体呈二帽畸变三角反棱柱.晶体结构沿着(001)面呈现一个网状结构.这种结构对研究稀土元素的结构化学、配位化学,化学键理论等提供了有用的实验数据.

关键词: 铵化合物, 晶体结构测定, 苯甲酸 P, 水合物, 化学键, 水络合物, 电子密度, 矩阵, 最小二乘法, 多元羧酸

NH4[ErL(H2O)3].4H2O (I; H4L = pyromellitic acid) crystallizes in the monoclinic space group P21/n, with Z = 4, a 10.330(4), b 10.282(5), c 16.446(8) ? b 98.75(4)? R = 0.0364. The Er(III) ion is 8-coordinated, being bonded to the 5 O atoms in the carboxyl groups and 3 O atoms of H2O with dicapped trigonal antiprism and the crystal structure is a polymeric network along (001) face. The preparation of I is described.

Key words: AMMONIUM COMPOUND, CRYSTAL STRUCTURE DETERMINATION, BENZENECARBOXYLIC ACID P, HYDRATE, CHEMICAL BONDS, AQUO COMPLEX, ELECTRON DENSITY, MATRICES, LEAST SQUARE METHODS, POLYCARBOXYLIC ACID

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